Hi I am a cake maker, .............., I have a 15" wedding cake on the bottom and I want this to sit on a 19" board, which does not exist, I have spent the morning going to 4 woodwork shops and not one can cut out a 19" circle 1/2" thick in mdf I remember a few years back the same thing with the outline of a life size guitar. \So as a last resort I want to know if I can do it mywself with a jigsaw, and suggestions or even places that would be obliging would be greatly appreciated.